Halloween Dinner?

DH informs me today that he invited over a guy from work and his family for dinner and ToTing tomorrow. I'm cool with it (well, would have preferred a bit more notice), but I am not sure what to serve. We could do pizza, but I'm on WW and that's just too blah. (Not to mention it would take us ordering at 3 to get here by 5.)

Any fun ideas that I can do for 7 children and 4 adults? Running the commissary in the morning for anything I need...